The report predicts that the push will come from the wind energy sector,thanks to a major boost from government-backed economic stimulus packages. And even though governments have not stepped up to the plate, businesses are still keenly interested in moving into the cleantech industry.

"Copenhagen did not deliver the low-carbon vision, clear policy landscape and regulatory frameworks that the energy clean tech investment community had hoped for," said Alex Desbarres, senior renewables analyst at Datamonitor. "For all its flaws, however, the Copenhagen Accord gave the clean tech community the sense that private investors will drive the transition to a low-carbon economy."

In 2008, cleantech investing hit an all-time high, and investors insisted it wasn't a bubble. However, there was still a failing economy to navigate. After a bit of a stall last year, we've heard that cleantech